基于盆栽试验的促根剂对低温条件下烤烟地上部生长和根系发育的影响  

Effects of root-promoting agents on flue-cured tobacco’s shoot and root development grown at low temperature based on pot experiment

作　　者：陈鹏宇 杨超[2] 汪代斌[2] 李科伟 委亚庆 陈益银[2] 张世浩 江厚龙[2] 习向银[1] CHEN Pengyu;YANG Chao;WANG Daibin;LI Kewei;WEI Yaqing;CHEN Yiyin;ZHANG Shihao;JIANG Houlong;XI Xiangyin(College of Resources and Environment,College of Agronomy and Biotechnology,Southwest University,Chongqing 400715,China;Chongqing Tobacco Science Research Institute,Chongqing Branch of CNTC,Chongqing 400715,China)

机构地区：[1]西南大学资源环境学院农学与生物科技学院,重庆市400715 [2]中国烟草总公司重庆市公司重庆烟草科学研究所,重庆市400715

出　　处：《烟草科技》2021年第1期17-23,共7页Tobacco Science & Technology

基　　金：中国烟草总公司重庆市公司科技项目“提高“渝金香”烟叶成熟度关键技术研究与应用”(NY20180401070005)。

摘　　要：为促进重庆烤烟早生快发,以云烟87为试验材料,采用光照培养箱盆栽试验研究了12℃下壳聚糖、萘乙酸+吲哚丁酸、复硝酚钠+海藻酸钠、生根粉、生物促根剂、Agri-star松土促根剂等几种促根剂对烤烟地上部和根系生长的促进效应,并通过田间试验验证了生物促根剂的增温效果。结果表明:壳聚糖、萘乙酸+吲哚丁酸、复硝酚钠+海藻酸钠、生根粉和生物促根剂(油枯+生石灰+生物炭+液体发酵剂)均能显著增加低温下烤烟的株高和茎围、地上部干物质积累,以及根长、根表面积、根体积。其中生物促根剂处理对烤烟地上部和根系发育促进作用最显著,且效果稳定。与对照(不使用促根剂)相比,Agri-star松土促根剂对低温条件下烤烟根数、根长、根表面积、根体积的促进效应最显著,但对烤烟地上部生长影响不明显。生物促根剂处理在烤烟还苗期和伸根期还具有保障土壤耕层持续增温效应,增温幅度为0.2~2.1℃。因此,生物促根剂可作为重庆烟区烤烟早生快发的适宜促根剂。In order to promote early growth and rapid development of flue-cured tobacco in Chongqing,Yunyan 87 was used in this pot experimental study under illumination incubators to investigate the effects of root-promoting agents(Chitosan,NAA and IBA,Compound sodium nitrophenolate and sodium alginate,ABT,biological root-promoting agent,Agri-star soil-loosening root-promoting agent)on the growth of flue-cured tobacco shoots and roots,and the warming effect of biological root-promoting agents was verified by a field experiment.The results showed that T1(Chitosan),T2(NAA and IBA),T3(Compound sodium nitrophenolate and sodium alginate),T4(ABT)and T8(Biological root-promoting agent made of oil cake,quicklime,biochar and starter)significantly promoted the plant height,stalk circumference,shoot dry matter accumulation,root length,root surface area and root volume of flue-cured tobacco grown at low temperatures.The promoting effects of T8 treatment on the development of flue-cured tobacco shoots and roots were the most significant and quite stable.Compared with the CK,the promoting effects of Agri-star soil-loosening root-promoting agent on the root number,root length,root surface area and root volume of flue-cured tobacco at low temperatures were the most significant,while its effects on the shoot growth were not obvious.T8 treatment could ensure the continuous warming effect of the soil tillage layer at seedling restoring stage and root extending stage of flue-cured tobacco with an increasing range of soil temperatures between 0.2 and 2.1℃.Therefore,this biological root-promoting agent was shown to be an effective means to promote the early growth and rapid development of flue-cured tobacco in Chongqing.

关 键 词：烤烟 促根剂 低温 根系发育 地上部生长 

分 类 号：S572.06[农业科学—烟草工业]